Liquid process duplicating machine and block-out means therefor



NW. 5, 1240, JAGGER 2,220,224

LIQUID PROCESS DUPLICATING MACHINE AND BLOCK-OUT MEANS THEREFOR Filed June 3. 1939 2 Sheets-Sheet l MOVE TICKET INVENTOR. Hubs/Z 459 ATTORNEYS.

H. .JAGGER Nam 5, i ifi.

LIQUID PROCESS DUPLICATING MACHINE AND BLOCK-011T MEANS THEREFOR Filed June 3, 1939 2 Sheets-Sheet 2 1N VEN TOR.

ATTORNEYS.

Patented Nov. 5, 1940 UNITED STATES LIQUID PROCESS DUPLICATING MACHINE AND BLOCK-OUT MEANS THEREFOR Hubert Jagger, Maywood, 111., assignor to Ditto, Incorporated, Chicago, 111., a corporation of West Virginia Application June 3, 1939, Serial No. 277,149

10 Claims,

My invention relates to block-out means for covering a portion or portions of a master sheet in position on the drum of a duplicating machine of the liquid process type, and it has for its ob- 5 ject the provision of a new and improved form of block-out device, together with a new and improved form and arrangement of cooperating means by which the device is adapted to be secured very quickly and easily in the desired position on the drum of the duplicating machine and is adapted thereafter to be just as quickly and easily removed from the drum so as to be kept for future use.

In the form of block-out means shown, the device comprises a sheet of cloth or other flexible material of such form as to have an appreciable resistance to bending, having two mounting bars thereon in spaced relation to each other across 20 the end of the device adapted by releasable engagement with angularly disposed grooves in the drum to hold the device securely in place so as to cover a portion of the master sheet carried by the drum. For attaining the desired results, the grooves are preferably continuous from one end of the drum to the other, so as to enable the block-out device to be positioned at any desired adjusted position longitudinally of the drum.

It is another object of my invention to improve 30 block-out means of this type in sundry details hereinafter pointed out. The preferred means by which I have accomplished my several objects are illustrated in the accompanying drawings and are hereinafter specifically described. That 35 which I believe to be new and desire to cover by Letters Patent is set forth in the claims.

In the drawings- Fig. 1 is a side face view of the drum of a liquid process type of duplicating machine with a master sheet secured thereon and with a portion of the master sheet covered or blocked out by the use of my improved block-out means;

Fig. 2 is a face view of one style of block-out device;

45 Fig. 3 is a view similar to Fig. 2, but showing a changed form of device by which only portions of the subject matter within the outline of the device are covered or blocked out;

Fig. 4 is a vertical cross sectional view across the parts as shown in Fig. 1, but with certain cooperating parts shown diagrammatically;

Fig. 5 is a perspective view of a portion of my improved block-out device;

Fig. 6 is a vertical cross sectional view taken substantially at the line 6-6 of Fig. 5; and

Fig. 7 is a view similar to a portion of Fig. 4, but showing the parts on an enlarged scale.

Referring now to the several figures of the drawings, .in which corresponding parts are indicated by the same reference characters, l0 indicates the drum of a liquid process duplicating machine provided with grippers I l for releasably holding in position a master sheet l2 wrapped about the drum, coiled springs l3 being provided in connection with the grippers H for holding the grippers in operative gripping position. The drum III is supported by a heavy shaft M by which power is applied to the drum for rotating it. An impression roller I5 is mounted in position to engage the'face of the drum, and forwarding rollers l6 and I! are provided for feeding a copy sheet l8 into position between the drum and the impression roller IS, a moistening device l9 of any suitable type being provided for supplying a film of solvent to the upper forwarding roller [6.

At the side of the drum just ahead of the position of the grippers II with reference to the direction in which the drum is rotated (counterclockwise in Fig. 4), I have provided two outwardly opening grooves 20 and 2|, as is best shown in Fig. '7, such grooves being spaced at a short distance from each other. In the arrangement shown, the rearmost one of the two grooves is obliquely disposed so as to open outwardly and forwardly, the other groove in the arrangement shown being also disposed obliquely so as to open outwardly and backwardly.

My improved block-out device comprises a sheet 22 of fairly flexible material such as cloth,

for example, having sufilcient body to provide at least an appreciable resistance to being bent. In the arrangement shown, the sheet is doubled into the form of a plait near one end portion at 23 having a mounting bar 24 fixedly secured on the doubled portion. In the arrangement shown, the mounting bar 24 is in the form of a strip of sheet metal bent into the form of a channel so as to grip the folded portion 23 of the sheet, being secured in position upon the folded portion of the sheet by means of rivets 25 which in the arrangement shown are formed integrally with the sheet metal. At the adjacent end of the sheet 22, the material is bent backwardly upon itself in the form of a plaitor a hem 26, such doubled portion having a mounting bar 21 fixedly secured thereon, such mounting bar 21 being likewise formed of. sheet metal bent into channelled form and secured in position by integral rivets 28.

With a master sheet l2 in position upon the drum, if it is desired that a portion of the master sheet be covered or blocked out, a device such as that shown in Fig. 5 is mounted in position at the desired point longitudinally of the drum so as to extend over and about the master sheet. The mounting bar 24 is inserted easily and readily into the groove 2| so as to provide a fairly sharp bend in the sheet 22 at the mouth of the groove 2|. The mounting bar 21 inserted into the groove 20, such mounting bar 21 also having a loose, easy fit in the groove. The arrangement is such that with the parts in the position as designated, the block-out sheet can be readily moved longtiudinally of the drum so as to bring the sheet into precisely the position desired; The sheet is preferably flexible enough that it is adapted to conform to the shape of the drum readily, but so as to have sufficient resistance to bending, so as to be effective for holding the bars 24 and 21 in position in the grooves 2| and 20. r

I have found in the use of my improved device, as shown and described, that the device can be very quickly and easily applied in position, can be readily adjusted to the desired point, and can be very quickly and easily removed when desired. At the same time, the device is effectively held in position during the rotation of the drum.

In the arrangement shown in Fig. 2, the blockout device comprises a sheet 22 in the form of a fairly narrow strip which is intact and complete within its outline. In the arrangement shown in Fig, 3, a sheet 29 is employed having a plurality of openings 30. 3| and 32 therein for blocking out irregularly shaped or positioned parts of the copy on the master sheet l2.

While I prefer to employ the form and arrangement of parts as shown in my drawings and as above described, it is to be understood that my invention is not limited to the arrangement shown except so far as the claims may be so limited, it being understood that changes might well be made in the form and arrangement of the parts without departing from my invention.

I claim:

1. In a liquid process duplicating machine, the combination of a rotatable drum having two grooves in its face longitudinally thereof in slightly spaced relation to each other with at least one of said grooves obliquely disposed so as to open outwardly and forwardly with reference to the direction of rotation of the drum, means carried by said drum for attaching a master sheet thereon adjacent to said grooves, and a blockout device comprising a sheet and mounting bars thereon near one.end adapted by engagement with said grooves respectively to hold the device releasably in position on the drum so as to cover at least a portion of the master sheet carried by the drum.

2. In a liquid process duplicating machine, the combination of a rotatable drum having two grooves in its face longitudinally thereof in slightly spaced relation to each other and arranged obliquely with at least one of said grooves opening outwardly and forwardly with reference to the direction of rotation of the drum, means carriedby said drum for attaching a master sheet thereon adjacent to said grooves, and a block-out device comprising a sheet and mounting bars thereon near one end adapted by engagement with said grooves respectively to hold the device releasably in position on the drum so as to cover at least a portion of a master sheet carried by the drum, the portion of the block-out sheet between said mounting bars being held smoothly on the face of the drum between said grooves.

3. In a liquid process duplicating machine, the combination of a rotatable drum having two grooves in its face longitudinally thereof, the rear one of which with reference to the direction of rotation of the drum opens outwardly and forwardly, means carried by said drum for attaching a master sheet thereon adjacent to said grooves, and a block-out device comprising a sheet and mounting bars thereon at one end portion adapted by engagement with said grooves respectively to, hold the device releasably in position on the drum so as to cover at least a portion'of the, g

master sheet carried by the drum, the portion of the block-out sheet between said mounting bars being adapted by a limited resistance to bending to assist in holding said mounting bars in position in said grooves.

4. In a liquid process duplicating machine, the combination of a rotatable drum having two grooves in its face longitudinally thereof in slightly spaced relation to each other and both arranged obliquely with the rear one at least with reference to the direction of rotation of the drum opening outwardly and forwardly, means carried by said drum for attaching a master sheet thereon adjacent to said grooves, and a block-out device comprising a sheet and mounting bars thereon at one end portion adapted by engagement with said grooves respectively to hold the device releasably in position on the drum so as to cover at least a portion of a master sheet carried by the drum, the portion of the block-out sheet between said mounting bars being adapted by a limited resistance to bending to assist in holding said mounting bars in position in said grooves with said portion of the block-out sheet spread smoothly on the face of the drum.

5. In a liquid process duplicating machine, the combination of a rotatable drum having two grooves in its face longitudinally thereof in slightly spaced relation and opening obliquely toward each other, means carried by said drum for attaching a master sheet thereon adjacent to said grooves, and a block-out device comprising a sheet and mounting bars thereon at one end portion adapted by engagement with said grooves respectively to hold the device releasably in position on the drum so as to cover at least a portion of a master sheet carried by the drum.

6. In a liquid process duplicating machine, the combination of a rotatable drum having two grooves in its face longitudinally thereof in slightly spaced relation to each other with at least one of said grooves obliquely disposed so as to open outwardly and forwardly with reference to the direction of rotation of the drum and with both of said grooves clear throughout the greater portions of their length, means carried by said drum for attaching a master sheet thereon adjacent to said grooves, and a block-out device comprising a sheet and mounting bars thereon at one end portion adapted by engagement with said grooves respectively at any desired point therealong to hold the device releasably in position on the drum so as to cover at least a portion of the master sheet carried by the drum.

'7. A block-out device comprising in combination a piece of flexible sheet material, a mounting bar fixedly secured on the end of said sheet, and a second mounting bar fixedly secured on said sheet at an intermediate point therealong in slightly spaced parallel relation to said firstnamed mounting bar so as to be capable of swinging freely with respect to said first-named mounting bar.

8. A block-out device comprising in combination a piece of flexible sheet material doubled into the form of a plait near one end, a. mounting bar fixedly secured on said doubled portion, and a second mounting bar fixedly secured on the adjacent end portion of the sheet parallel with said first-named mounting bar.

9. A block-out device comprising in combination a piece of flexible sheet material doubled into the form of a plait near one end, a mounting bar in the form of a strip of sheet metal bent into channelled form and fixedly secured on said doubled portion, and a second mounting bar also in the form of a strip of sheet metal bent into channelled form and fixedly secured on the adjacent.

end portion of the sheet parallel with said firstnamed mounting bar.

10. A block-out device comprising in combination a fairly flexible piece of sheet material having an appreciable resistance to bending, a mounting bar fixedly secured on the end said sheet, and a second mounting bar fixedly secured on said sheet at an intermediate point therealong in slightly spaced parallel relation to said firstnamed mounting bar so as to cooperate therewith for holding the device in position on a drum.

HUBERT J AGGER. 

